

def all_goods():
    goods = {"可口可乐":2.5,"百事可乐":2.5,"冰红茶":3,"脉动":3.5,
            "果缤纷":3,"绿茶":3,"茉莉花茶":3,"尖叫":2.5}
    return goods 
def show_goods():
    for x, y in all_goods().items():
        print(x,":",str(y)+"元")
def total(goods_dick):
    count = 0 
    for name , num in goods_dick.items():
        total_money = all_goods()[name]*num
        count += total_money
    print("需要支付金额:",count,"元")
def main():
    goods_dict ={}
    print("饮品自动售货机")
    show_goods()
    print("输入q完成购买")
    while True:
        goods_name = input("请输入购买商品:")
        if goods_name == 'q':
            break
        if goods_name in [g_name for g_name in all_goods().keys()]:
            goods_num = input("请输入购物数量:")
            if goods_num.isdigit():
                goods_dict[goods_name] = float(goods_num)
            else:
                print('商品数量不合法')
        else:
            print('请输入正确的商品名称')
            total(goods_dict)
if __name__ == '__main__':
    main()
        
